Cannot load FirePOWER module from Ubuntu, when I start ASDM it's initializing FirePOWER module but then ASDM loads without FirePOWER tab in configuration, no error messages appears. With Windows PC no problem
Did you know I need to install some additional software on Linux PC?
Hardware is ASA 5506-X
Can the Ubuntu computer reach the module's IP address?
Don't just use icmp (ping) to check but see if you can ssh to the module's address as that will use tcp/22 and require symmetric routing.
Yes, it's true that it needs tcp/443 for ASDM. But obviously that's not working for some reason - thus I suggest trying ssh which should also be available on the module.
If ssh works then the routing / NAT / etc. is all ok and we can focus on the ASDM issue. If ssh does not work then the issue isn't specific to ASDM and we focus our attention elsewhere.